Narrow beam indoor motion detector. Protects windows, doors, and valuables. With the MotionProtect Curtain detectors, you can secure the perimeter of your home and move freely indoors. If an intruder breaks in, the system will raise an alarm and notify the security company. Burglars won’t get through the garage door undetected when MotionProtect Curtain is active. The curtain detector will continue to operate even if the temperature falls to -10°C. In a museum, visitors can stroll among the exhibits as they please. But if they cross the line and reach towards an artwork, an alarm will be triggered. When installed correctly, MotionProtect Curtain keeps your private property safe and ignores pets, even if they are Saint Bernards.